Ginger is our redesigned and improved version of the Flipster. It much more accurately resembles the character of the Ampeg SB-12 Portaflex amp that inspired it. Check it out: http://runoffgroove.com/ginger.html
Six sound clips are available on the Sounds page: http://runoffgroove.com/salvo.html#ginger
As a bassist always in search of the next killer bass distortion, I am super excited about this update. The original flipster was way cool!
I broke away from finals to take listen. This sounds killer.
brian, i read the notes and applaud your drive to get it better and better. also, nice that you strayed outside the lines of the original circ to pay homage to the sound of the original.
the clips sound great. i know a lot of bass players will dig this.
Strange how the guitar clips all have some noticeable overdrive but the bass clips (other than the last
one) are not overdriven much at all. The bass playing seemed lite handed...maybe that's it.
Either way, nice work fellas!
Sounds great! ;D
Anyone want to do a run of pcbs? :)
Quote from: bigandtall on November 29, 2011, 05:00:41 PM
Anyone want to do a run of pcbs? :)
+1 for that.
Sounds great on guitar.
Strong approval.
Is there any reason the red LEDs by Q1 and Q2 can't be replaced with 1N5818's in the manner they are placed by Q3?
Looks like a sweet design.
Could you not scale down the 1M resistor in the mu-amp stage to like 470K? Just trying to wrap my head around the circuit, looking forward to putting one together.
Quote from: azrael on November 30, 2011, 10:04:46 AM
Looks like a sweet design.
Could you not scale down the 1M resistor in the mu-amp stage to like 470K? Just trying to wrap my head around the circuit, looking forward to putting one together.
1M is fine .
Quote from: wesman26 on November 30, 2011, 03:31:24 AM
Strong approval.
Is there any reason the red LEDs by Q1 and Q2 can't be replaced with 1N5818's in the manner they are placed by Q3?
The diodes on the first two 2N5457 JFETs are chosen as red LEDs because their conduction voltage (aprox. 1.5V) is very similar to the maximum input voltage without clipping for the 2N5457. This prevents harder clipping. Eventually three silicon diodes in each direction could be used.
Quote from: stm on November 30, 2011, 11:06:44 AM
Quote from: wesman26 on November 30, 2011, 03:31:24 AM
Strong approval.
Is there any reason the red LEDs by Q1 and Q2 can't be replaced with 1N5818's in the manner they are placed by Q3?
The diodes on the first two 2N5457 JFETs are chosen as red LEDs because their conduction voltage (aprox. 1.5V) is very similar to the maximum input voltage without clipping for the 2N5457. This prevents harder clipping. Eventually three silicon diodes in each direction could be used.
So, this is the first time I've seen this done. Could this technique be used on any signal you don't want getting too hot before it hits an active component?
I thought this project would benefit from a PCB with all the pads along the edge, option for various trimmer sizes, and no standing resistors. I believe it to be correct, but still need to check it. Anyone fancy going over it for errors?
(http://dl.dropbox.com/u/967492/ROG%20Ginger/FC%20Ginger%20PCB.gif)
(http://dl.dropbox.com/u/967492/ROG%20Ginger/FC%20Ginger%20PnP.gif)
Quote from: Bill Mountain on November 30, 2011, 12:33:24 PM
Quote from: stm on November 30, 2011, 11:06:44 AM
Quote from: wesman26 on November 30, 2011, 03:31:24 AM
Strong approval.
Is there any reason the red LEDs by Q1 and Q2 can't be replaced with 1N5818's in the manner they are placed by Q3?
The diodes on the first two 2N5457 JFETs are chosen as red LEDs because their conduction voltage (aprox. 1.5V) is very similar to the maximum input voltage without clipping for the 2N5457. This prevents harder clipping. Eventually three silicon diodes in each direction could be used.
So, this is the first time I've seen this done. Could this technique be used on any signal you don't want getting too hot before it hits an active component?
I've also never seen this done. Very cool.
Trimpot pads are wrong.
Quote from: Davelectro on November 30, 2011, 09:49:34 PM
Trimpot pads are wrong.
I respectfully disagree. Why are they wrong?
@frequencycentral - It's a little tough to check without the part values or a part numbered schematic.
Quote from: chi_boy on December 01, 2011, 12:25:00 AM
Quote from: Davelectro on November 30, 2011, 09:49:34 PM
Trimpot pads are wrong.
I respectfully disagree. Why are they wrong?
I might be missing something here but all their leads seem to share the same trace. They are not supposed to work as variable resistors that way.
Edit: Nevermind. I got it. I was confused because leads are hardly noticeable over the black pads. :icon_wink:
I've updated my layout (above) with component values. If it's not showing above with the values, refresh your cookies and pour a glass of milk. Still needs a little check over.
Quote from: chi_boy on December 01, 2011, 12:25:00 AM
@frequencycentral - It's a little tough to check without the part values or a part numbered schematic.
When I do layouts, I find I work quicker if I don't add the values when I add the components. And when I add the values later I have to cross reference between the schematic and the layout, which is a bit of a double check of the layout. So......it may be a little tough to check without the part values, but........that's how I roll. ;)
Quote from: frequencycentral on December 01, 2011, 02:14:56 PM
When I do layouts, I find I work quicker if I don't add the values when I add the components. And when I add the values later I have to cross reference between the schematic and the layout, which is a bit of a double check of the layout. So......it may be a little tough to check without the part values, but........that's how I roll. ;)
That's cool. I'm just a rookie. Thought I would try, but kept getting lost. Practice, Practice, Practice.....
I don't see the 6k8 from Gain to GND. Am I missing it?
Quote from: chi_boy on December 01, 2011, 09:02:09 PM
I don't see the 6k8 from Gain to GND. Am I missing it?
Good catch, it's missing. I'll add it later. Anything else?
Quote from: frequencycentral on December 02, 2011, 02:25:44 AM
Quote from: chi_boy on December 01, 2011, 09:02:09 PM
I don't see the 6k8 from Gain to GND. Am I missing it?
Good catch, it's missing. I'll add it later. Anything else?
I checked it over and didn't find anything else. Very nice quick work!
Tremblay , where's the listing on ROG for the UBE Screamer ? :icon_cry:
Quote from: DavenPaget on December 02, 2011, 08:49:08 AM
Tremblay , where's the listing on ROG for the UBE Screamer ? :icon_cry:
http://runoffgroove.com/ubescreamer.html
It was never properly linked or released, despite some further revisions following the contest. Thanks for reminding us!
Thanks ! ;D
I always loved the UBE screamer but i would lose the link all the time ... it doesn't even show up on google even ...
Quote from: B Tremblay on December 02, 2011, 08:25:40 AM
Quote from: frequencycentral on December 02, 2011, 02:25:44 AM
Quote from: chi_boy on December 01, 2011, 09:02:09 PM
I don't see the 6k8 from Gain to GND. Am I missing it?
Good catch, it's missing. I'll add it later. Anything else?
I checked it over and didn't find anything else. Very nice quick work!
Thanks! 6.8k now added (R20 on my layout), some stuff moved about to accomodate it. Should be all good now.
What's the chance that you could add a true bypass (maybe a 3P2T) section on that layout. I'm new to this board, but I have done similar projects in the past.
You can find bypass diagrams on generalguitargadgets.com
Or Tonepad. Look at #5
http://www.tonepad.com/getFile.asp?id=76 (http://www.tonepad.com/getFile.asp?id=76)
:o nice sound you got there.love it.will try to make 1. ;D
(http://i49.photobucket.com/albums/f262/whitedk57/Ginger.jpg)
(http://i49.photobucket.com/albums/f262/whitedk57/GingerWithParts.jpg)
I thought I would copy the OP's design and add a true-bypass switch to it. I got the design for the bypass switch from http://www.generalguitargadgets.com/diagrams/switch_lo_3pdt_ig_dcjack.gif?phpMyAdmin=78482479fd7e7fc3768044a841b3e85a (http://www.generalguitargadgets.com/diagrams/switch_lo_3pdt_ig_dcjack.gif?phpMyAdmin=78482479fd7e7fc3768044a841b3e85a).
I wonder if you guys can look this over and let me know if I have made a mistake or not...
Wondering about the LED's. Many Jfet designs, for example the amp sims, use the Jfets for distortion. In this design, it appears that the LED/Diode distortion is preferred over the Jfet distortion? I thought the point of using Jfets was that they had "better" clipping characteristics than clipping diodes???
Should this be seen as a way to add additional clipping stages to Jfet/Mosfet designs? What's Up? ;)
My layout if now verified, a friend of mine just built it.
Just finalized my perfboard version, waiting on my drill press to come and this sucker will be done! Sounds great, I tested it on an SVT with Jazz Bass and the tone is super creamy. I can definitely see what the benefit of using the LEDs is, the clipping is really soft sounding but with a lot of growl. I love it!
This is my first legit build, I did a real simple GE fuzz circuit to get my feet wet which turned out pretty cool, but this thing is badass! Finished right on time too, we are just about to start bass overdubs for the new Hiders record and this will be just the thing for some of those tracks, i'm sure. I'm definitely hooked and looking forward to my next build, maybe a Kay Fuzz-Clone or trem-something.
Does anyone think it would be worth the time to socket the caps on the tonestack to tweak out values/materials?
(http://i49.photobucket.com/albums/f251/divinec/GingerGuts1.jpg)
(http://i49.photobucket.com/albums/f251/divinec/gingerguts2.jpg)
Hello, I'm new to this forum as well as new to mu-amps. I was curious how to increase the gain of this circuit to get more distortion from my pedal. It would be nice to have about twice the amount of gain.
Thanks
-Benjamin
I don't know if this is necessarily a good idea, but I flipped the last tranny - the 2n5088 - upside down and it about doubled the gain. Anyways, that's my noob advice...
I'm in the middle of putting this pedal together. I made a rookie mistake and put the schottky diodes in the same direction instead of asymmetrical. I've tried removing one of them to flip it, but it's soldered in there really well. Will the pedal still work with this diode as-is?
I'm not really clear on what that pair of diodes is doing in this circuit. Is it clipping in addition to the red LEDs? If so, the circuit should still work, but with less clipping, right?
(http://www.runoffgroove.com/ginger.png)
Quote from: cultrvultr on March 25, 2012, 04:06:49 AM
I'm in the middle of putting this pedal together. I made a rookie mistake and put the schottky diodes in the same direction instead of asymmetrical. I've tried removing one of them to flip it, but it's soldered in there really well. Will the pedal still work with this diode as-is?
I'm not really clear on what that pair of diodes is doing in this circuit. Is it clipping in addition to the red LEDs? If so, the circuit should still work, but with less clipping, right?
Correct
Removing a pair will create less clipping.
The LEDs on the front I wouldn't think would be clipping your signal much though.
FYI, according to ROG:
"each stage has a pair of clipping diodes at the gate to avoid hard clipping in the JFET stages"
Quote from: bluebunny on March 25, 2012, 02:55:44 PM
FYI, according to ROG:
"each stage has a pair of clipping diodes at the gate to avoid hard clipping in the JFET stages"
Hmmm....good to know. I guess I should swap the diode around. Thanks!
Could anyone suggest a diode that clips at a lower gain setting than the 1N5818?
Quote from: Benjamin AM on March 26, 2012, 11:10:50 AM
Could anyone suggest a diode that clips at a lower gain setting than the 1N5818?
That's about as low as it gets. The one's I have clip at .1 volts.